Locking wrench

Abstract

The utility model relates to a locking wrench which comprises a holding part, and one end of the holding part is integrally formed and fixedly connected with a locking part used for clamping a bolt or a nut. The holding part comprises a first handle and a second handle, one end of the first handle and one end of the second handle are integrally formed and fixedly connected, a semicircular locking part is formed at the joint of the first handle and the second handle, an opening of the locking part faces the extending direction of the first handle and the second handle, and a stepped tooth surface is arranged on the inner wall surface of the locking part. When in use, the locking part only needs to be sleeved on a bolt or a nut, so that the stepped tooth surface is clamped on the outer wall of the bolt or the nut, then the first handle and the second handle are held by hands, and then the handles are rotated, so that the use is simple and convenient. Compared with an original locking wrench, the improved locking wrench is more time-saving and labor-saving, meanwhile, bolts or nuts of different sizes and specifications can be screwed, and the practicability of the locking wrench is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wrenches, in particular to a locking wrench. Background Art

[0002] A wrench is a commonly used installation and disassembly tool. It is a hand tool that uses the principle of leverage to turn bolts, screws, nuts and other threaded fasteners with openings or holes. Wrenches are usually made of structural steel of carbon or alloy materials. Wrenches usually have openings or holes for clamping bolts or nuts at one or both ends of the handle. When in use, external force is applied to the handle along the direction of thread rotation to turn the bolt or nut.

[0003] The basic principle of a wrench is the lever principle. The lever principle refers to the conversion of work by applying force and generating torque on a fixed fulcrum. In a wrench, the fulcrum is the rotating shaft of the wrench, the force is the manual force applied to the wrench handle, and the torque is described by the length of the wrench rod and the distance from the force application point. The main function of a wrench is to tighten or loosen fasteners such as bolts and nuts. Its advantage is that it is easy to apply force, and the force can be amplified through the lever principle, making it easier to achieve force conversion and rotation.

[0004] In the prior art, reference Figure 1 It is a very common locking wrench on the market, which includes a handle and a semicircular spanner integrally formed and fixedly connected to one end of the handle. The spanner is provided with a plurality of grooves, and the plurality of grooves form an uneven rough surface of the spanner. When in use, the spanner is clamped on the bolt or nut, and the bolt or nut can be tightened by turning the handle.

[0005] The above-mentioned prior art solutions have the following defects: firstly, the wrench of the locking wrench is set in a semicircular opening, which is easy to fall off or slip when twisting, and the actual operation takes a long time, which is not conducive to the efficiency of workshop production. Secondly, the single handle is extremely time-consuming and laborious to use, and because the size of the semicircular wrench is fixed, it can only be used to twist specific bolts or nuts, which is of low practicality. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a locking wrench, which, by improving the original locking wrench, not only makes the locking wrench more time-saving and labor-saving to use without changing the mechanical principles, but also can screw bolts or nuts of different sizes, thereby improving the practicality of the locking wrench.

[0007] The above utility model object of the utility model is achieved through the following technical solutions:

[0008] A locking wrench comprises a gripping portion, one end of which is integrally formed and fixedly connected with a locking portion for clamping a bolt or a nut.

[0009] As a further technical solution of the present utility model: the holding portion includes a first handle and a second handle, one end of the first handle is integrally formed and fixedly connected with one end of the second handle, a semicircular locking portion is formed at the connection between the first handle and the second handle, and the opening of the locking portion faces the direction in which the first handle and the second handle are extended.

[0010] As a further technical solution of the utility model: a stepped tooth surface is provided on the inner wall surface of the locking portion.

[0011] As a further technical solution of the utility model: the stepped tooth surface is composed of a plurality of inclined grooves connected to each other in sequence, and the bottom surface of the inclined groove is 1 cm.

[0012] As a further technical solution of the present invention: the first handle is arranged straightly, and the second handle is arranged curvedly.

[0013] As a further technical solution of the present invention: the ends of the first handle and the second handle are both provided with chamfers.

[0014] As a further technical solution of the utility model: the locking wrench is made of steel material.

[0015] In summary, the utility model includes at least one of the following beneficial technical effects:

[0016] The utility model discloses a locking wrench. When in use, it is only necessary to sleeve the locking part on the bolt or nut so that the stepped tooth surface is clamped on the outer wall of the bolt or nut, and then hold the first handle and the second handle by hand, and then turn the handle. It is simple and convenient to use. It uses the lever principle and the force balance principle, and realizes a labor-saving lever by adjusting the length and angle of the lever. Compared with the original locking wrench, the improved locking wrench is more time-saving and labor-saving, and can also screw bolts or nuts of different sizes, thereby improving the practicality of the locking wrench. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an existing wrench in the background technology of the utility model.

[0018] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure numerals: 1, locking portion; 2, first handle; 3, second handle; 4, stepped tooth surface; 5, chamfer angle. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0021] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0022] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] Embodiment 1:

[0024] Reference Figure 2 , is a locking wrench disclosed in the utility model, comprising a gripping portion, one end of which is integrally formed and fixedly connected with a locking portion 1 for clamping a bolt or a nut. In this embodiment, the gripping portion comprises a first handle 2 and a second handle 3, one end of the first handle 2 is integrally formed and fixedly connected with one end of the second handle 3, a semicircular locking portion 1 is formed at the connection between the first handle 2 and the second handle 3, and the opening of the locking portion 1 faces the direction in which the first handle 2 and the second handle 3 extend.

[0025] The inner wall surface of the locking part 1 is provided with a stepped tooth surface 4, which is composed of a plurality of mutually connected inclined grooves, and the bottom surface of the inclined groove is 1 cm. When tightening the bolt or nut, the stepped tooth surface 4 can stably clamp the side of the bolt or nut, and to a certain extent avoid the phenomenon of the locking wrench slipping or falling off.

[0026] The first handle 2 is arranged straight, and the second handle 3 is arranged curved. Such an arrangement is more ergonomically designed and more labor-saving to use. The ends of the first handle 2 and the second handle 3 are both provided with a guide angle 5, and the setting of the guide angle 5 prevents the tip from scratching the user during use, thereby improving safety. The locking wrench is made of steel material, and the locking wrench made of steel material has high hardness, which improves the service life.

[0027] The implementation principle of the utility model is as follows: the utility model discloses a locking wrench. When in use, it is only necessary to sleeve the locking part 1 on the bolt or nut so that the stepped tooth surface 4 is clamped on the outer wall of the bolt or nut, and then hold the first handle 2 and the second handle 3 by hand, and then turn the handle. It is simple and convenient to use. It uses the lever principle and the force balance principle, and realizes a labor-saving lever by adjusting the length and angle of the lever. Compared with the original locking wrench, the improved locking wrench is more time-saving and labor-saving, and can also turn bolts or nuts of different sizes, thereby improving the practicality of the locking wrench.

[0028] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A locking wrench, characterized in that: It comprises a gripping portion, one end of which is integrally formed and fixedly connected with a locking portion (1) for clamping a bolt or a nut; The gripping portion comprises a first handle (2) and a second handle (3), one end of the first handle (2) and one end of the second handle (3) are integrally formed and fixedly connected, a semicircular locking portion (1) is formed at the connection between the first handle (2) and the second handle (3), and an opening of the locking portion (1) faces the direction in which the first handle (2) and the second handle (3) extend; The inner wall surface of the locking portion (1) is provided with a stepped tooth surface (4).

2. A locking wrench according to claim 1, characterized in that: The stepped tooth surface (4) is composed of a plurality of oblique grooves which are connected to each other in sequence, and the bottom surface of the oblique groove is 1 cm.

3. A locking wrench according to claim 1, characterized in that: The first handle (2) is arranged in a straight manner, and the second handle (3) is arranged in a curved manner.

4. A locking wrench according to claim 1, characterized in that: The ends of the first handle (2) and the second handle (3) are both provided with chamfers (5).

5. The locking wrench according to claim 1, characterized in that: The locking wrench is made of steel material.

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